GB1205436A - Improvements in and relating to refractory materials and processes of their preparation - Google Patents
Improvements in and relating to refractory materials and processes of their preparationInfo
- Publication number
- GB1205436A GB1205436A GB39073/67A GB3907367A GB1205436A GB 1205436 A GB1205436 A GB 1205436A GB 39073/67 A GB39073/67 A GB 39073/67A GB 3907367 A GB3907367 A GB 3907367A GB 1205436 A GB1205436 A GB 1205436A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- magnesia
- mixture
- microns
- refractory material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/42—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/12—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
1,205,436. Refractory materials. SOCIETE GENERALE DES PRODUITS REFRACTAIRES. 24 Aug., 1967 [26 Aug., 1966; 16 Jan., 1967], No. 39073/67. Headings C1A and C1J. A refractory material, containing magnesia, comprises a crystal structure of contiguous monocrystals of a size at least equal to 20 microns, particularly periclasite monocrystals, assembled in crystalline aggregates of a grain size at least equal to 200 microns; and has a specific density of at least 3, an apparent porosity not greater than 8% by volume and a resistance to thermal deformation such that linear shrinkage does not exceed 0.5% after being maintained at 1500 C. for 24 hours and subsequently at the same temperature and under a load of 2 kg./cm.<SP>2</SP> for a further 100 hours. The refractory material may contain at least 92% of its total weight of magnesia the rest comprising the oxides present in the initial mixture which are not eliminated during firing. A preferred refractory product contains at least 92% by weight of a mixture of from 20 to 80% by weight of magnesia and 80 to 20% by weight of at least one other refractory material chosen from Cr 2 O 3 , natural chromite, TiO 2 and calcined dolomite. The refractory material is made by preparing from fully calcined magnesia of a purity corresponding to that required for the final product, a mixture having by weight at least 50% of grains of sizes between 5 mm. and 0.2 mm., of which at least half is of between 5 mm. and 1À5 mm., less than 50% of magnesia crushed to less than 200 microns and 1 to 6% of recrystallization additions, e.g. combinations of the SiO 2 -CaO or B 2 O 3 -CaO systems, crushed to less than 74 microns, forming this mixture to shape, firing the resultant products at a temperature between 1550 and 1650 C., causing the formation of a transient liquid phase of high vapour pressure which by at least partial volatilization of its ingredients promotes the formation of the monocrystals and the crystalline aggregates. Optionally, the mixture contains 0.2 to 1% by weight of an organic binder, e.g. bisulphite lye.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR74294A FR1496825A (en) | 1966-08-26 | 1966-08-26 | Dense magnesia-based refractories |
| FR91257A FR91681E (en) | 1966-08-26 | 1967-01-16 | Dense magnesia-based refractories |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1205436A true GB1205436A (en) | 1970-09-16 |
Family
ID=26172786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39073/67A Expired GB1205436A (en) | 1966-08-26 | 1967-08-24 | Improvements in and relating to refractory materials and processes of their preparation |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US3536505A (en) |
| BE (2) | BE701975A (en) |
| BR (2) | BR6792379D0 (en) |
| DE (1) | DE1671067B1 (en) |
| ES (2) | ES344076A1 (en) |
| FR (1) | FR91681E (en) |
| GB (1) | GB1205436A (en) |
| NL (1) | NL6711156A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0140221A2 (en) * | 1983-10-31 | 1985-05-08 | Shin Nihon Chemical Industry Co., Ltd. | Magnesia clinker and method of producing the same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1001604A (en) * | 1961-03-20 | 1965-08-18 | Yawata Iron & Steel Co | Coarse crystal magnesia refractory material |
| US3180744A (en) * | 1962-07-27 | 1965-04-27 | Harbison Walker Refractories | Refractory |
| NL302986A (en) * | 1963-02-18 | |||
| NL297687A (en) * | 1963-04-04 | |||
| US3309209A (en) * | 1963-08-26 | 1967-03-14 | Kaiser Aluminium Chem Corp | Refractory |
| US3316107A (en) * | 1965-07-08 | 1967-04-25 | Harbison Walker Refractories | Fired chrome-magnesite refractories |
| US3378383A (en) * | 1965-10-11 | 1968-04-16 | Kaiser Aluminium Chem Corp | High magnesia product and process of making the same |
| US3395031A (en) * | 1966-01-05 | 1968-07-30 | William W. Campbell | Burned basic refractory |
| US3390002A (en) * | 1966-06-07 | 1968-06-25 | Dresser Ind | Magnesite refractories |
| US3473939A (en) * | 1967-04-10 | 1969-10-21 | Kaiser Aluminium Chem Corp | Direct-bonded periclase refractories and process of preparing same |
-
1967
- 1967-01-16 FR FR91257A patent/FR91681E/en not_active Expired
- 1967-07-28 BE BE701975D patent/BE701975A/xx unknown
- 1967-07-28 BE BE701973D patent/BE701973A/xx unknown
- 1967-08-03 DE DE19671671067 patent/DE1671067B1/en active Pending
- 1967-08-12 ES ES344076A patent/ES344076A1/en not_active Expired
- 1967-08-12 ES ES344078A patent/ES344078A1/en not_active Expired
- 1967-08-14 NL NL6711156A patent/NL6711156A/xx unknown
- 1967-08-22 BR BR192379/67A patent/BR6792379D0/en unknown
- 1967-08-22 US US662276A patent/US3536505A/en not_active Expired - Lifetime
- 1967-08-24 GB GB39073/67A patent/GB1205436A/en not_active Expired
- 1967-08-31 BR BR192616/67A patent/BR6792616D0/en unknown
-
1970
- 1970-05-08 US US35890A patent/US3652306A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0140221A2 (en) * | 1983-10-31 | 1985-05-08 | Shin Nihon Chemical Industry Co., Ltd. | Magnesia clinker and method of producing the same |
| EP0140221A3 (en) * | 1983-10-31 | 1987-01-07 | Shin Nihon Chemical Industry Co., Ltd. | Magnesia clinker and method of producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| US3536505A (en) | 1970-10-27 |
| US3652306A (en) | 1972-03-28 |
| DE1671067B1 (en) | 1971-11-11 |
| ES344076A1 (en) | 1968-11-16 |
| BE701975A (en) | 1968-01-02 |
| ES344078A1 (en) | 1968-11-01 |
| NL6711156A (en) | 1968-02-27 |
| FR91681E (en) | 1968-07-26 |
| BR6792379D0 (en) | 1973-05-29 |
| BR6792616D0 (en) | 1973-01-23 |
| BE701973A (en) | 1968-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |